<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .box{
            background-color: #fff;
            width: 300px;
            height: 120px;
            display: inline-block;
            margin: 3rem;
            padding: 1rem;
            text-align: center;
        }
    </style>
</head>
<body>
    <h2>支持：IE9+ 浏览器</h2>
    <div class="box" style="box-shadow:0 0 15px 0 rgba(0,0,0,.2)">box-shadow:0 0 5px 0 rgba(0,0,0,.2)</div>
    <div class="box" style="box-shadow:15px 0 15px 0 rgba(0,0,0,.2)">box-shadow:15px 0 5px 0 rgba(0,0,0,.2)</div>
    <div class="box" style="box-shadow:0 15px 15px 0 rgba(0,0,0,.2)">box-shadow:0 15px 5px 0 rgba(0,0,0,.2)</div>
</body>
</html>